The lexer creates tokens (see TokenType and Token) from an input string. The input string is expected to be in infix notation form. The lexer can convert an infix stream into a postfix stream (Reverse Polish Notation) for further processing by a Parser.
Constructors
- Lexer()
-
Creates a new lexer.
Properties
- hashCode → int
-
Get a hash code for this object.…
read-only, inherited - intBuffer → String
-
Buffer for numbers
read / write - keywords → Map
-
read-only
- runtimeType → Type
-
A representation of the runtime type of the object.
read-only, inherited - varBuffer → String
-
Buffer for variable and function names
read / write
Operators
-
operator ==(
other) → bool -
The equality operator.…
inherited
Methods
-
noSuchMethod(
Invocation invocation) → dynamic -
noSuchMethodis invoked when users invoke a non-existent method on an object. The name of the method and the arguments of the invocation are passed tonoSuchMethodin anInvocation. IfnoSuchMethodreturns a value, that value becomes the result of the original invocation.…inherited -
shuntingYard(
List<Token> stream) → List<Token> -
Transforms the lexer's token stream into RPN using the Shunting-yard algorithm. Returns a list of Token in RPN form. Throws an
ArgumentErrorif the list is empty. -
tokenize(
String inputString) → List<Token> -
Tokenizes a given input string. Returns a list of Token in infix notation.
-
tokenizeToRPN(
String inputString) → List<Token> -
This method invokes the createTokenStream methode to create an infix token stream and then invokes the shunting yard method to transform this stream into a RPN (reverse polish notation) token stream.
-
toString(
) → String -
Returns a string representation of this object.
inherited